A simple answer is 1 and 105.
Two common multiples of 21 and 15 are 105 and 315.
105 and 210 are.
105 and 210
You need at least two numbers to find an LCM and there can only be one least common. If you want to know multiples of 105, just keep adding 105. 105, 210, 315 and so on.
Just multiply 105 by different integers, to get the multiples: 105 x 0 105 x 1 105 x 2 etc.
There is an infinite number of common multiples for 84 and 105. A common multiple of any two or more numbers is any number into which each of two or more numbers can be divided evenly (zero remainder).
You need at least two numbers to find an LCM. The multiples of 9 between 70 and 105 are 72, 81, 90 and 99.
You need at least two numbers to find an LCM.
Multiples of 105 include 105, 210, 315 and so on. For them to be common, they need to be compared to another set of multiples.
This cannot be determined because the common multiples of any two or more numbers are infinite.
105 / 9 = 11.6 recurring - that is 11.6666... or 11 and two thirds.
There are infinitely many common multiples of 3, 5 and 7, each one 105 larger than the previous one. Or to put it another way: the common multiples of 3, 5 and 7 are the multiples of their lowest common multiple which is 105. ie their common multiples are all the multiples of 105, of which there is no end - there is an infinite number of multiples of 105 (or any other number [except zero]).